Gem-setting.



No. 722,824. PATENTED MAR. 17, 1903. G. W, DOVER. GEM SETTING.

APPLIUATION FILED SEPT. 17, 1902.

N0 MODEL.

3mm, mm

UNITED STATES PATENT OFFICE.

GEORGE W. DOVER, OF CRANSTON, RHODE ISLAND.

GEM-SETTING.

SPECIFICATION forming part of Letters Patent N0. 722,824, dated March17, 1903.

Application filed September 17, 1902. Serial No. 123,672. (No model.) 7

T0 aZZ whom it may cancer-7w Be it known that I, GEORGE W. DOVER, acitizen of the United States, residing at Oranston, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Gem-Settings, of which the following is aspecification.

My invention relates to gemsettings, and has for its objects the endscommonly sought in such devices; but more particularly it is designed toovercome the common tendency of the prongs to radially expand andrelease the gem. This is sure to occur when any unusual blow or pressureupon the top of the gem occurs.

To attain the ends sought, my invention consists in the novelconstruction and arrangement of parts'hereinafter set forth inconjunction with the accompanying drawings, wherein Figure 1 is a planview of my new radial support for the prongs of a setting; Fig. 2, atransverse central section of a setting en gaged by the support; Fig. 3,a plan of the unfolded setting planchet or blank; Fig. 4, a top planView of the same bent into position for receiving the radial support,and Fig. 5 a side elevation of the completed setting.

Like letters of reference indicate like parts throughout the views.

My setting is formed by striking or cutting from a sheet of metal aplanchet consisting of a body a, with radial arms 79, provided withshoulders c and terminating in points 61, as shown in Fig. 3. The radialarms are upwardly bent, and the lateral shoulders c are inwardly foldedinto parallel planes, as indicated in Fig. 4.

I provide an anchor, brace, or support for the points d, similar to thatshown in Fig. 1.

. It consists of a planchet- 13, comprising radial arms 6, correspondingin number with the prongs of the setting sought to be anchored. The endsf of the arms are preferably enlarged,especially when it is sought toaugment the beauty of the completed setting by ornamenting that portionof the end f which projects beyond the edge of the setting. These endsare each provided with a slot g. The support-B is placed over thesetting member, (shown in Fig. 4,) so that the points d of the lattertraverse the openings g, and the endsf of the radial arms e rest uponthe shoulders c of the setting A. The gem O is then placed upon thesupport B, Fig. 2, and the points (I are inwardly bent to grip the gem.

It is evident that any blow or pressure upon the gem will haveabsolutely no eifect upon the prongs b of the setting; further,

that by varying the shape of the tipf of the support B and ornamentingthe upper portion of the same in any desired manner or by providing anextension of the same with radial prongs to hold auxiliary settings thebeauty of my setting may be greatly enhanced.

Having described my invention, what I claim is 1. In a gem-setting thecombination with the setting-prongs of a gem mounted in the prongs, abrace comprising radial arms joining the setting-prongs and means uponthe ends of the radial arms for engaging the prongs.

2. In a gem-setting the combination with the setting-prongs providedwith shoulders, of points above the shoulders, a planchet provided withslots resting upon the shoulders and traversed by the points, and a gemembraced by said points, and resting upon the planchet.

3. In a gem-setting the combination with the setting-prongs, of a bracecomprising radial arms joining the setting-prongs, and means upon theends of the radial arms for engaging the prongs.

4:. In a gem-setting the combination with the setting-prongs providedwith shoulders, of a planchet provided with slots resting upon theshoulders and engaging the prongs.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

GEORGE W. DOVER.

Witnesses:

HORATIO E. BELLows, ZENNER JACKSON.

